We stayed at Disney for a week for our wedding which was on 1st March.
The weather was very good, although we had a couple of cooler days.
It was 80 degrees the day of our wedding.
A light jacket was sometimes needed in the evening.
It was busy, but not as busy as Easter or Christmas.
Coming from a Floridian who spends lots of time in WDW, the weather is pretty much clear skies, a sweater is nice in the morning and definitely as the sun goes down, it's like 70 at lunch time and 60 morning and night. It's a beautiful time
We had our wedding held on Feb 22. We were worried about cold weather according to weather forecast . But the weather turned out pretty nice...very sunny and not cold at all(even at 6 am when we were taking castle photos)